Why Do Onions Make You Cry?
Cutting an onion releases syn-propanethial-S-oxide — a volatile gas that reacts with your tear film to form sulfuric acid on your eyes. Here is the chemistry, and which prevention tricks actually work.
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Cutting an onion releases syn-propanethial-S-oxide — a volatile gas that reacts with your tear film to form sulfuric acid on your eyes. Here is the chemistry, and which prevention tricks actually work.